All Trainers and Pokemon grow and evolve - and this expansion restores the very first Pokemon trading cards to glory! With the exhilarating power of Mega Venusaur-EX, Mega Charizard-EX, and Mega Blastoise-EX, plus some wild surprises like Dragonite-EX, Ninetales BREAK, Machamp BREAK, and Mega Slowbro-EX, the classic hardbattling Pokemon and old-school trainers are reinvented for a new generation.The Steam Siege set contains over 110 cards in the set, including 8 new dual-type Pokemon, 6 new Pokemon-EX (including 2 Mega Evolution Pokemon), and 7 new Pokemon BREAK.